Climate change is set to change almost every aspect of life in the UK, according to a landmark government report - but as environmental activists point out, it's still the world's poorest countries that will be worst affected.

That's not to downplay the effects on the UK. The picture painted by the report is stark and dramatic.

Higher temperatures could see up to 5,900 more people dying as a result of hot summers, and the costs to the UK of flooding could rise to billions of pounds a year.

Admittedly the changing climate will bring some opportunities to the UK too, including the chance to grow new crops and even the possibility of more tourism as temperatures get milder, the report says.

Craig Bennett, director of policy and campaigns of Friends of the Earth, is adamant that wealthy countries have a responsibility to help fund extensive research and planning efforts in the developing world.

"In a way we get off lightly in this country compared to other countries," Bennett said. "And yet it is the poorest countries in the world that will suffer most from climate change even though they have the least to do with why it's happening in the first place."

The cost of the government's project of which the report was a part was more than £2.8m - and it was mandated by the Climate Change Act as a matter of law, Bennett points out. Other countries in the developing world have neither the finances or the political will to respond in kind.

Those countries are also the least likely to be able to adapt to deal with extreme weather, including flooding from rising sea levels, and rising temperatures.

"There are two things that have to happen," he said. "Critically we do need to see the rich countries help put the facilities and funding in place to enable studies like this to be done in other countries and regions of the world.

"But actually what is then behind that is rich countries needing to provide the funding for those countries to adapt, both to support their low-carbon development but also to provide them with the money that's needed to adapt to climate change."

The cost may seem high, Bennett says - but it's nothing compared to what it will cost once the effects of climate change really take hold.

"We're talking around £200bn per annum," he said. "That's tiny compared to the kind of money that's currently being found to bail out the banks.

"The rich countries really need to live up to their responsibilities and start thinking about how they're going to find this smaller sum of money to bail out the poorest countries from the impact of climate change."